METREL MA 2067 User manual

Demonstration board
MA 2067
Instruction manual
Version 1.4.5, Code no. 20 750 789

2
Distributor:
Manufacturer:
Metrel d.d.
Ljubljanska cesta 77
SI-1354 Horjul
Slovenia
https://www.metrel.si
[email protected]
Mark on your equipment certifies that it meets requirements of all subjected EU
regulations.
Hereby, Metrel d.d. declares that the MA 2067 is in compliance with subjected
EU directive. The full text of the EU declaration of conformity is available at the
following internet address https://www.metrel.si/DoC.
© 2022 METREL
The trade names Metrel®, Smartec®, Eurotest®, Auto Sequence®are trademarks registered in Europe and other
countries.
No part of this publication may be reproduced or utilized in any form or by any means without
permission in writing from METREL.

Demonstration board MA 2067 Contents
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1. Introduction...........................................................................................................4
2. Description of the demonstration board.............................................................5
2.1 Front panel..........................................................................................................5
2.2 Command part (back side of the demonstration board)......................................7
2.3 Demonstration board support..............................................................................8
3. Technical data.......................................................................................................8
4. Connection to mains voltage...............................................................................9
5. List of possible measurements on the board...................................................11
6. Simulation of errors............................................................................................13
7. List of instruments to be used in combination with the board.......................15
8. Maintenance........................................................................................................16
8.1 Cleaning............................................................................................................16
8.2 Service..............................................................................................................16
9. Standard set........................................................................................................17
10.Options................................................................................................................17

Demonstration board MA 2067 Introduction
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1. Introduction
Demonstration board MA 2067 is a school facility. It simulates real low voltage electro-
installation. Major elements like fuses, RCD protection switches, outlets etc. are
incorporated.
The board is designed to be used in middle level electrical schools in order to improve
practical and theoretical knowledge of listeners on electro-installation, on possible errors
of installation and on how to carry out different measurements of electro-installation. It is
aimed as well to be used at sale-demonstration rooms for presentation of electro-
installation testers and their application.
Demonstration board enables demonstration on three earthing systems: TT, NT, IT.
It performs the following major activities:
Education of students / pupils on low voltage electro-installation.
Practical training and courses about measurements on low voltage electro-
installation and simulation of errors both, on electro-installation and on connected
appliances.
Demonstration on how to use different measurement instruments.
The board's plug is prepared to be connected to three-phase mains installation or to
one-phase installation with help of one-phase adapter. The board can be used in
horizontal position for small groups of listeners or in vertical position for demonstration
in a class, presentation at seminar, exhibition etc.

Demonstration board MA2067 Description of the demonstration board
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2. Description of the demonstration board
2.1 Front panel
Fig.1. Front panel

Demonstration board MA2067 Description of the demonstration board
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Meaning of abbreviations on front panel
J1 to J5 ...........................Jumper 1 to Jumper 5
LR 1 ................................Lightning rod 1
LR 2 ................................Lightning rod 2
BG ..................................Basic Grounding
AUX rod 1 .......................AUXiliary rod 1
AUX rod 2 .......................AUXiliary rod 2
C1 ...................................Current probe 1
C2 ...................................Current probe 2
P1 ...................................Potential probe 1
P2 ...................................Potential probe 2
MPE ...............................Main Potential Equilizing
EC1 to EC3 ....................Earth Collector 1 to Earth Collector 3
F1 ...................................Fuse –Lamp 1
F2 ...................................Fuse –3-phase outlet
F3 ...................................Fuse –3-phase motor
F4 ...................................Fuse –Outlet 1
F5 ...................................Fuse –Lamp 2
F6 ...................................Fuse –Washing machine
F7 ...................................Fuse –Outlet 2
F8 ...................................Fuse –Outlet 3
F9 ...................................Fuse –Computer system
B1 to B9 ..........................Branch 1 to Branch 9

Demonstration board MA2067 Description of the demonstration board
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2.2 Command part (back side of the demonstration board)
Fig.2. Command part (protection screen lifted up)
Legend:
1…Key lock for protection screen locking
2…Protection screen to cover command part
3…Automatic fuse which:
protects demonstration board and a user of the board in case of a fault on line L1
(simulated errors in command part excluded)
serves for general on/off of the board
serves for reset (reswitching on) of the board in case protection electronic inside
the board trips the board due to a certain fault (simulated errors in command part
excluded)
4…Switches for simulation of different errors

Demonstration board MA 2067 Technical data
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2.3 Demonstration board support
Fig.3. Support
Use the support in case demonstration board is to be used in vertical position for
demonstration to a wider audience. It is possible to fix the support to a table using two
screws (which are not a part of the standard set) in order to improve stability of
demonstration board (when pulling out and pushing in test plugs).
3. Technical data
Mains connection .................three-phase (4m) type 3P+N+PE or one-phase type, using
one-phase adapter (2m)
Width ...................................680 mm
Height ..................................450 mm
Mass ....................................12,5 kg approx.
Fixing to a table ...................by means of two screws (distance between fixing holes is
700 mm)
Respected standards ...........EN 61010-1 (safety)
EN 50081-1 (EMC)
EN 50082-1 (EMC)
VDE 0100 (construction of electro-installation)
Test sockets .........................one-phase with PE terminal
three-phase (3L+N+PE)
Protection classification........(PE terminal connected to metal housing)

Demonstration board MA 2067 Connection to mains voltage
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4. Connection to mains voltage
Before connecting the Demonstration board to mains installation, the following must be
checked by the operator:
That PE terminal is present at mains outlet which is to be used for connection of the
board and that there are no damages noticed at the outlet (mechanical damages,
broken contacts etc.)
That there are no damages present at board's plug and at board itself (damaged
outlets, mechanical damages of other elements etc.)
That there is an RCD protection switch ∆=30 mA involved in mains installation to be
used for supplying of the board (recommendation)
Attention!
The board is allowed to be used only in presence of properly educated person-
teacher, when using it in schools.
Use only attached, original jumpers (defined distance between two ends) for
carrying out required connections on front panel of the board.
Use the test outlets on front panel for test purpose only and not for supplying
different loads (radio, cooker, lamp etc.) because the components inside the
board (wiring, switches, contacts, resistors etc.) are dimensioned for test
purpose only.
Do not short accessible contacts at one-phase or three-phase outlets.
Connection to 3-phase outlet
Fig.4. Connection of the Demonstration board to 3-phase outlet

Demonstration board MA 2067 Connection to mains voltage
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Connection to one-phase outlet
Phase mark
Fig.5. Connection of the Demonstration board to one-phase outlet
Not intended for insulation tests
Note:
The equipment contains a special input protection circuit. Please ensure minimum of 10
s between unplugging the demo board and plugging it in again. This will enable that the
protection circuit is working correctly.

Demonstration board MA 2067 List of possible measurements on the board
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5. List of possible measurements on the board
Insulation resistance between:
Phase terminals on 3-ph. outlet
Phase terminals/PE terminal on 3-ph. outlet
Phase terminals/neutral terminal on 3-ph. outlet
PE/neutral terminal on 3-ph. outlet
Phase terminals/neutral terminal
Phase terminals/PE terminal on one-ph. outlets
PE/neutral terminal on one-phase outlets
PE terminal/motor housing
Phase terminal/washing machine housing
Isolated installation/PE terminal on IT system
Connection between:
MPE/gas installation
MPE/isolated part of gas installation
MPE/heat installation
MPE/water installation
MPE/shield of CCTV cable
MPE/EC1
MPE/EC2
MPE/EC3
EC1/PE terminal of outlet 1
EC1/motor housing
EC1/PE terminal of 3-ph. outlet
EC1/lamp 1 housing
EC2/lamp 2 housing
EC2/washing machine housing
EC2/PE terminal of outlet 2
EC3/PE terminal of outlet 3
EC3/computer system housing
Motor housing/radiator
Earth resistance of:
Basic grounding system with parallel connection of water and heat water installation
(classic method)
Basic grounding system (clamp method)
Lightning system 1 (classic method)
Lightning system 1 (clamp method)
Lightning system 2 (classic method)
Lightning system 2 (clamp method)
Parallel connection of lightning systems 1 and 2 (classic method)

Demonstration board MA 2067 List of possible measurements on the board
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Ground resistivity:
Distance abetween test rods is 1 meter
Distance a between test rods is 3 meters
Distance a between test rods is 10 meters
Distance a between test rods is 12 meters
Line impedance between:
Phase/neutral terminals on outlet 1
Phase/neutral terminals on outlet 2
Phase/neutral terminals on outlet 3
Phase terminals/neutral terminal on 3-ph. outlet
Phase terminals on 3-ph. outlet (in case the board is connected to 3-ph. mains
installation)
Loop impedance between:
Phase/PE terminals on outlet 1
Phase/PE terminals on outlet 2
Phase terminals/PE terminal on 3-ph. outlet
Phase rotation:
On 3-ph. outlet ( in case the board is connected to 3-ph. mains installation)
Leakage current:
Into PE terminal on washing machine connection (clamp method-loop 5)
From washing machine to floor (clamp method-loop 3, loop 4, loop 5)
Of whole installation (clamp method-loop 1)
Into basic grounding system (clamp method-loop 2)
Trip out time and tripping current of 300mA RCD protection switch:
On outlet 1
On 3-ph. outlet
Trip out time and tripping current of 30mA RCD protection switch:
On outlet 2
Contact voltage UB:
On PE terminal of outlet 1
On motor housing
On radiator
On lamp 1 housing

Demonstration board MA 2067 Simulation of errors
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
On PE terminal of outlet 2
On washing machine housing
On lamp 2 housing
Mains voltage and frequency of the voltage between:
Phase terminals on 3-ph. outlet
Phase terminals/neutral terminal on 3-ph. outlet
Phase terminals/neutral terminal on one-phase outlets
6. Simulation of errors
It is possible to demonstrate 19 different errors and also their combinations. There are
error switches in the command part of the board, that can switch on errors described
nearby the switches (see fig.2).
Value of measurement parameters in case switch is in on or in off position see in the
table below.

Demonstration board MA 2067 Simulation of errors
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List of possible error simulations on electro-installation
Ground resistivity

Demonstration board MA 2067 List of instruments
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7. List of instruments to be used in combination
with the board
In order to avoid any damage on the Demonstration board or on test instrument which is
used in combination with the board, it is advisable to use the following instruments for
carrying out the measurements:
EurotestXA MI 3105
EurotestAT MI 3101
EurotestXE MI 3102
EurotestCOMBO MI 3125B
EurotestLITE MI 3002
EurotestEASI MI 3100
EurotestXA MI 3105
EurotestCOMBO MI 3125
Eurotest 61557 MI 2086
Instaltest 61557 MI 2087
Earth-Insulation Tester MI 2088
Smartec Insulation / Continuity MI 3121
Smartec Z Line –Loop / RCD MI 3122
Smartec Earth / Clamp MI 3123
Smartec RCD Loop / Line MI 2120
Smartec Insulation / Continuity MI 2123
Smartec Earth / Clamp MI 2124
Installcheck MI 2150
For other instruments please consult the producer of the board.

Demonstration board MA 2067 Meintenace
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8. Maintenance
8.1 Cleaning
Use soft patch slightly moistened with water or alcohol to clean the surface of the
Demonstration board and leave it to dry totally after the cleaning.
Do not use liquids based on petrol!
Do not spill cleaning liquid over the instrument!
8.2 Service
In case of any board malfunction or if there is any damage noticed at the board, the
board must be serviced by a competent service department. Contact your dealer or
producer of the board for further information.
There are no customer replaceable components at the board (except two fuses (F6 and
F7 type D01 6A) on front panel)!
Producer's address:
METREL d.d.
Ljubljanska 77
SI-1354 Horjul
Tel.: [phone]
Fax.: [phone]
http://www.metrel.si;
E-mail:[email protected]

Demonstration board MA 2067 Meintenace
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9. Standard set
Demonstration board
Jumper, 4pcs
Board support for vertical use
Three phase to one phase adapter
Instruction manual
Booklet with exercises
10. Options
Fuse D01 6A…………………………………code 83002465
Jumper………………………………………..code 83002466

Demonstration board MA 2067 Meintenace
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Demonstration board MA 2067 Meintenace
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Demonstration board MA 2067 Meintenace
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